The document summarizes information about St. Patrick's Day, including that it is celebrated on March 17th in honor of St. Patrick, the patron saint of Ireland. Some of the traditions associated with St. Patrick's Day are wearing green, eating corned beef and cabbage, attending parades, and recognizing symbols like the shamrock and leprechauns. The shamrock was used by St. Patrick to illustrate the holy trinity, and according to legend, St. Patrick drove all the snakes from Ireland.